Hi, I just came across this thread on LastPass forum in which the thread starter identified CCleaner as the culprit behind LastPass's problem. Israel, who is a LastPass developer, appears unsurprised and even criticized CCleaner developers for failing to respond to their request. The other user advise the thread starter not to use CCleaner which is in my opinion is a bad advice.
I'm running LP and CCleaner and I don't encounter the issue the thread starter described, but I do have concerns and this is something you might want to take a look into.
I use LastPass and CCleaner has never done it any harm and has never deleted any plugin.
I do consider it unwise to have CCleaner purging stuff on startup - and especially dangerous if it does it on Auto with out supervision.
One of the first things I do after logon is to launch Firefox, and when it appears I see that I am already logged onto the LastPass system.
I can easily believe that chaos will result if LastPass is being connected at startup and making use of %TEMP% files whilst CCleaner is busily purging %TEMP%.